Northern Australia experiences the majority of its annual rainfall in the Austral summer, a critical resource for life in the region. Previous generation climate models from the CMIP5 archive disagreed on the projected changes in the region under the high emissions scenario, with some predicting large increases while others predicted large decreases. While it is unclear which of these outcomes is more likely, there was evidence that the models showing drying trends were less realistic. Specifically, the projected changes were correlated with biases in the western equatorial Pacific ocean, implying some interference from problematic teleconnections. New state-of-the-art climate models submitted to the CMIP6 archive are likely to have decreased biases in the western equatorial Pacific, with a small subset of available models already showing some improvement in the well documented equatorial “cold-tongue” bias. Nevertheless, even in the small available sample of CMIP6 models we already find disagreement between models on the projected changes. In the present study we investigate what influence these biases have on projected changes to the Australian monsoon in CMIP6, and what other patterns emerge when comparing models with opposing projections. We attempt to relate model simulation of the Australian monsoon to a theoretical framework for monsoons based on the energy budget, and present these new CMIP6 model projections in comparison to those from CMIP5 models.